Swift-XRT Survey of Fermi Unassociated Sources


These results are part of the Swift program to follow-up Fermi unassociated sources in an attempt to find X-ray counterparts to the unidentified gamma-ray sources. As new observations are performed, these pages will be updated in nearly real time. Please use these results as a guide and proceed with caution when using them in a publication since they are the result of an automated analysis.

When using these data and results in publications, please reference M.C. Stroh & A.D. Falcone 2013, ApJS, 207, 28; arXiv: 1305.4949 for a description of many of the analysis techniques used to reduce these data (note: a more detailed paper describing the complete data set and analysis is forthcoming). Please contact Abe Falcone and Michael Stroh at unassociated@swift.psu.edu if you have any questions about the program or the analysis, or to simply to let us know that you've made use of these data.


Caution: For completeness, sources are listed if the "detection" exceeds 3 sigma. The significances and images are shown so you can make more stringent significance cuts, if desired.

3FGL J1809.2-2725

Field

Detected Excesses

Swift-XRT image of the field for 3FGL J1809.2-2725 Swift-XRT detections in the field for 3FGL J1809.2-2725

Detected Excesses (SNR(Sosta) > 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 09 41.39 -27 35 06.43 6.65 (7 ± 2) x 10-3 14 2.845 3.052

Rejected Excesses (Due to Overlaps or SNR(Sosta) < 3.0)

# R.A. (J2000) Dec. (J2000) Pos. Error (") Rate (cts/s) Counts SNR (Detect) SNR (Sosta)
1 18 09 54.72 -27 18 20.94 6.78 (7 ± 2) x 10-3 10 2.701 2.821
2 18 08 34.91 -27 28 17.55 6.93 (9 ± 4) x 10-3 12 2.542 2.256

X-Ray and Gamma Ray Catalogs

More Catalogs

Swift-XRT image with known X-ray and gamma ray sources for 3FGL J1809.2-2725 Swift-XRT image with known radio, optical and UV sources for 3FGL J1809.2-2725

Known X-Ray and Gamma Ray Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Observatory/Database Table
1 1WGA J1809.4-2728 18 09 24.10 -27 28 00.84 2.99 ROSAT
2 3XMM J180903.5-272944 18 09 03.53 -27 29 44.52 4.86 XMM-NEWTON
3 1WGA J1809.4-2730 18 09 25.80 -27 30 50.40 5.63 ROSAT
4 1WGA J1809.6-2725 18 09 41.59 -27 25 57.72 5.78 ROSAT
5 1WGA J1809.1-2731 18 09 10.10 -27 31 54.84 6.35 ROSAT
6 3XMM J180901.1-273155 18 09 01.10 -27 31 55.20 7.01 XMM-NEWTON
7 3XMM J180844.1-273023 18 08 44.18 -27 30 23.04 8.41 XMM-NEWTON
8 3XMM J180910.2-273415 18 09 10.25 -27 34 15.24 8.65 XMM-NEWTON
9 3XMM J180847.2-273219 18 08 47.21 -27 32 19.32 9.15 XMM-NEWTON
10 3XMM J180936.2-273358 18 09 36.26 -27 33 58.32 9.47 XMM-NEWTON
11 3XMM J180834.5-272821 18 08 34.58 -27 28 21.36 9.48 XMM-NEWTON
12 3XMM J180840.0-273158 18 08 40.70 -27 31 58.80 10.08 XMM-NEWTON
13 3XMM J180908.6-273542 18 09 08.69 -27 35 43.08 10.15 XMM-NEWTON
14 1WGA J1809.7-2734 18 09 42.41 -27 34 15.96 10.44 ROSAT
15 3XMM J180830.1-272828 18 08 30.14 -27 28 28.56 10.46 XMM-NEWTON
16 3XMM J180934.8-273542 18 09 34.85 -27 35 42.72 10.90 XMM-NEWTON
17 3XMM J180941.7-273504 18 09 41.71 -27 35 04.20 11.03 XMM-NEWTON
18 3XMM J180916.6-273657 18 09 16.68 -27 36 56.88 11.27 XMM-NEWTON
19 3XMM J180935.0-273617 18 09 35.40 -27 36 17.28 11.45 XMM-NEWTON
20 3XMM J180841.6-273425 18 08 41.69 -27 34 25.32 11.53 XMM-NEWTON
21 1RXS J180957.5-271839 18 09 57.48 -27 18 38.88 11.66 ROSAT
22 3XMM J180923.1-273725 18 09 23.14 -27 37 25.32 11.85 XMM-NEWTON
23 3XMM J180906.0-273726 18 09 06.19 -27 37 26.40 11.94 XMM-NEWTON
24 3XMM J180935.0-273651 18 09 34.99 -27 36 51.84 11.98 XMM-NEWTON
25 3XMM J180932.0-273711 18 09 32.90 -27 37 11.28 12.07 XMM-NEWTON
26 3XMM J180936.0-273714 18 09 36.70 -27 37 14.52 12.41 XMM-NEWTON
27 3XMM J180828.4-273228 18 08 28.44 -27 32 28.32 12.47 XMM-NEWTON
3XMM J180935.1-273725 18 09 35.16 -27 37 25.32 12.51 XMM-NEWTON
28 3XMM J180848.9-273648 18 08 48.94 -27 36 48.96 12.60 XMM-NEWTON
3XMM J180937.4-273725 18 09 37.44 -27 37 24.96 12.69 XMM-NEWTON
29 3XMM J180840.4-273616 18 08 40.42 -27 36 16.20 13.15 XMM-NEWTON
30 3XMM J180828.0-273411 18 08 28.10 -27 34 11.28 13.54 XMM-NEWTON
31 3XMM J180823.5-273518 18 08 23.59 -27 35 18.60 15.02 XMM-NEWTON
32 3XMM J180825.8-271432 18 08 25.87 -27 14 32.28 15.70 XMM-NEWTON

Known Radio, Optical and UV Sources

# Source Name R.A. (J2000) Dec. (J2000) Offset (') Database Table
1 NVSS J180912-272011 18 09 12.50 -27 20 11.04 5.54 NVSS
2 NVSS J180922-271535 18 09 22.80 -27 15 34.92 10.22 NVSS
3 NVSS J180902-273649 18 09 02.59 -27 36 50.04 11.51 NVSS
4 NVSS J180859-273738 18 08 59.21 -27 37 39.00 12.50 NVSS
5 NVSS J180954-271417 18 09 54.00 -27 14 17.16 14.24 NVSS
6 PMN J1808-2714 18 08 32.21 -27 14 33.00 14.73 PMN
7 NVSS J180824-271505 18 08 24.41 -27 15 06.12 15.54 NVSS

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